Laser beam receiver

1. A laser beam receiver for receiving a scanning laser, comprising an optical member, and a photodetecting means including a plurality of photodetectors; wherein the photodetectors are arranged on a line substantially perpendicular to a scanning direction in which the laser bean moves for scanning, the optical member is disposed in front of the photodetectors, expands the laser beam in a direction crossing the photodetectors and is capable of diffusing the expanded laser beam such that the shape of the expanded laser beam is maintained.

2. A laser beam receiver for receiving a scanning laser according to claim 1 , wherein the receiving means for receiving an expanding laser beam comprising two light receiving elements arranged on a line perpendicular to a scanning direction and two light receiving elements are divided into two sections.

3. A laser beam for receiving a scanning laser according to claim 1 , wherein an optical member for expanding a scanning laser light in the scanning direction is the lenticular lens and the diffusing part is formed on the optical member for diffusing the transmitted laser light.

4. A laser beam receiver for receiving a scanning laser according to claim 1 , wherein a fluorescent material is contained in an optical member instead of the diffusing part.